Environmental Life Cycle Cost for Durable Porous Surface Layers with Synthetic Binders

For noise reduction, the Netherlands use surface layers with a porous structure. The resulting surface layers have a shorter service life than non-porous surface layers. This causes frequent replacements and, therefore, high costs and congestion, which causes extra economical and environmental (value for time) damage. To limit these problems, this paper proposes to lengthen the service life by replacing the bitumen binder with a synthetic variant. Changing the binder to a synthetic variant is generally not considered because the binder is about II times more expensive than traditional. It is assumed that the resulting synthetic porous surface layer (SPSL) can have a service life that is prolonged with a decade. On the basis of indefinite life cycle cost calculations (NPV∞) on the cost effectiveness of the SPSL, it is concluded that the surface layer costs the same as tradition al surface layers. The environmental life cycle cost even results in higher benefits because of less congestion nuisance (value for time). Due to a high variance in the results, it is recommended to develop SPSL for a niche market. At sharp curves and on and off ramps, a shorter service life can be cost effective and beneficial.

並列關鍵字

Indefinite net present value (NPV∞) ； Noise reduction ； Porous surface layer ； Service life ； Synthetic

國際替代計量

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